Portable window-platform.



No. 660,l74. Patented Oct. 23, I900.

' A. H. TISGHER.

PORTABLE WINDOW PLATFORM.

(Application filed Mar. 22, 1900.)

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No. 660,|74. Patent ad Oct. 23, I900. A. anscnsn.

PORTABLE WINDOW PLATFORM.

[Application filed Mar. 22, 1900.)

(No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFICE.

ALFRED H. TISOHER, OF MINNEAPOLIS, MINNESOTA.

PO RTAB LE WIN DOW- PLATFO RM.

SPECIFICATION forming part of Letters Patent No. 660,174, dated October 23, 1900.

Application filed March 22, 1900- Serial No. 9,657. (No model.)

' to make and use the same.

My invention has for its object to provide an improved window platform or scaffold adapted for application to and removable from the windows of buildings and especially adapted to serve to support a person at the outer side of the window in position to clean the Window or to paint the framework of same.

To the above ends the invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims. v

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a plan View of my improved window platform or scaffolding, the same being shown as secured in working position in a Window, the frame of which is shown in horizontal section. Fig. 2 is a View in side elevation of the platform or scaifold applied as shown in Fig. 1, the window-frame'being shown in section and some parts of the scaffolding being broken away; and Fig. 3 is a detail View in side elevation, showing a portion of one of the extension-boards and a bracket for detachably securing the same to one of the transverse extension-rods.

The numeral 1 indicates a portion a of a building, and the numeral 2 indicates a window-frame of ordinary construction having the ordinary window-sill 3.

My improved platform is preferably laterally adjustable, so as to fit windows of different Widths, and hence it is made up of sections at and one or more removable intermediate sections or boards 0. The sections a are preferably formed with marginal strips a, and they are adjustably connected together by several transversely-extended rods a that work loosely through keeper-brackets of, secured on the bottoms of the said sections a. At their ends the rods 0. are shown as provided with pins aflwhich prevent them from being withdrawn from their keeperbrackets a Said rods a are adapted to be secured in difierently-adjusted positions to their keeper-brackets a by means of setscrews a which work through the upper portions of said bracket and impinge upon the said rods. To give access to the set-screws, which set-screws are preferably in the form of thumb-screws, the sections a are perforated immediately above the same, as shown at a".

When the sections a are drawn apart, the space between them may be filled by one or more spacing-boards 0, provided with pronged brackets c, that are adapted to straddle the extension-rods (0 as best shown in Fig. 3.

On the upper surfaces of the sections a are clamping-blocks f, that extend in line with each other and are adj ustably secured by iongitudinally-extended slots a and clampingbolts f, that work in said slots and are provided, at their upper ends with nuts preferably in the form of thumb-nuts f The blocks f are provided with'projecting ledges f adapted to overlie a lock-bar g, to be presently more fully considered.

To the under side of the sections a are adjustably secured in a similar manner to the blocks f retaining blocks or bars is, provided with projecting ledges k. Bolts 10 passed through the said blocks and through the slots of, heretofore noted, are provided at their upper ends with thumb-nuts k Outward of the slots a the platform-sections at are provided with similar slots a and to the under sides of said sections at, below these slots, are secured in line with each other clamping blocks or bars m, through which and the said slots a bolts 471,, provided at their upper ends with thumb-nuts m are passed to adjustably secure the said blocks m in different positions longitudinally of the platform.

To apply the platform or scaffolding to a window, the lock-bar g is placed transversely of the platform, with its ends overlapping the window-frame and with its intermediate portion clamped and held by the blocks f. The

blocks m are then adjusted against the outer edge of the lower sill portion of the windowframe 2. To further secure the device, the blocks 7c are adjusted and caused to overlap the inner portion of the sill 3, as shown in the drawings. These clamping-blocks 7c receive but very little, if any, of the strain; but they nevertheless prevent the bar g from slipping upward. The main strains of the load are taken between the blocks m and the so-called lock-bar g, and they without the said blocks 70 will secure the device securely to a window. If desired, a chain p, provided at its ends with screW-eyesp, may be applied, as shown in Fig. 2, between the inner end of the platform and the wall Z of the building. In most cases, however, the chain would not be used.

To prevent defacing of the window frame or casings, the bar g is provided with rubber or leather or similar facings g", and the clamping-blocks 7c are shown as provided with similar facings 7.5 to prevent defacing of the window-sill 3. Of course, if desired, such facings may be applied to the platform at various other points-as, for instance, to the side bars a, as shown at a".

From the foregoing description it will be understood that the platform or scaffold above described may be quickly attached to and removed from a window of a building and may be properly adjusted to a window of any size. It will be found an extremely desirable device for use in cleaning windows of large buildings and, as already indicated, is also serviceable for use in painting a building. Two of these platforms supported from distant windows of the same story would serve to support a third platform or timber extended from one to the other of the said devices and would thus obviate the use of suspended platforms. It will be further understood that the invention above described is eeo, 174

capable of considerable modification within the spirit of my invention.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. The combination with the platform having the slots 01, and a of the stop-block 'm adjustably secured to the under side of said platform by nutted bolts passed through said slots a the adjustable stop f provided with a projection or ledge f secured to the upper side of said platform by the nutted bolts passed through said slots a and the loose lock-bar g mounted on said platform cooperating with said stopf and projection or ledge f to lock the platform of the window, substantially as described.

2. The combination with the laterally-adjustable platform comprising the sections a and having the keeper-brackets a of the rods (1 working through said keepers, and means for securing said platform to a window, substantially as described.

3. The combination with the platform comprising the sections 0. having the keeperbrackets a and connected by the rods Q2, of

the spacing-board I) having the pronged' ALFRED H. TISOHER.

Witnesses:

MABEL M. MOGRARY, F. D. MERCHANT. 

